A CMOS MedRadio Receiver RF Front-End With a Complementary Current-Reuse LNA

摘要

An ultra-low-power 401–406-MHz Medical Device Radiocommunications Service receiver RF front-end for biomedical telemetry applications is implemented using 0.18-$mu$m CMOS technology. A single-ended complementary current-reuse low-noise amplifier (CCRLNA) is proposed that achieves a power gain of 20 dB, noise figure (NF) of 2.8 dB, IIP3 of ${-}$ 8.1 dBm, and second-order intercept point of ${+}$34 dBm while consuming only 150 $mu$W at 1-V supply voltage. The total receiver RF front-end, including the proposed CCRLNA, in-phase/quadrature folded mixers, and local oscillator buffers, achieves a conversion gain of 28.7 dB, NF of 5.5 dB, and third-order intercept point of ${-}$ 25 dBm while consuming less than 500 $mu$W from a 1-V supply voltage and occupying 0.7 mm$^{2}$ of core die area.